"The Song of Iowa" is the regional anthem of the U.S. state of Iowa, written by S. H. M. Byers in 1867 and adopted as the official state song by the Iowa State Legislature on March 20, 1911. The song is set to the tune "O Tannenbaum" and Byers' lyrics' theme is centered on his love and praise for Iowa.

Samuel Hawkins Marshall Byers was an American soldier and poet who wrote the poem "Sherman's March to the Sea", which was the origin of the eponymous term. Byers served in the 5th Iowa Infantry Regiment. He found success in a post-war writing career, including many poems about his native Iowa—most notably "The Song of Iowa", which was declared as Iowa's state song in 1911.